I emailed about a dozen realtors in the area and asked permission to fly over their home listings, or to contact the homeowners and secure permission in return for any stills they wanted from the footage I got. These were all realtors who had expensive, photogenic listings, including some multi-million-dollar estates in the hills. I emphasized that they would not be hiring me, that I wouldn't take any money and that it was me seeking a place to fly, not them engaging someone to fly commercially. I got only two replies. One, a realtor who handled the sale of my wife's aunt's house after she died, and one stranger. The first fellow was enthusiastic, but he is now independent and didn't have any current listings. The other said no way, that no realtor would touch that because of potential liability issues. I've given up on the idea. I'm in California.